Automating Dev Environment - Introduction to Docker and Chef

Automating Dev Environment - Introduction to Docker and Chef

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  AUTOMATING DEV ENVIRONMENT INTRODUCTION TODOCKER & CHEF Kamalika Majumder
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  Nightmares working onlocal dev env  Too many manual tasks required in setup  Performance issue/machine is too slow  Inconsistency with production environment  My code works fine only on my machine but not in production.
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  How to solve Environment on Demand  Automated Configuration Management  Faster Deployment cycle  Better performance
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  Introduction to Docker An open source software used to perform various operations with linux containers.  Helps in creating environment on demand.  Containers are light weight(Typical laptops can run around 10-100 containers)  Simple and easy CLI , makes it easy to script  Using Docker registry makes it easier to share linux containers across the teams.
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  Why Docker
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  • Run dockerimages • Docker File usage • Docker registry Short Demo
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  Key Notes  100Docker instances does not mean 100 VMs.  Each docker run command is run as a process on the host machine.  Docker is still under development, so it is not yet recommended for production  Distros : Ubuntu, Centos, Redhat .In order to make it work on mac you need a VM with the above distros.  By default it works on bridge network - docker0 , each containers gets a virtual interface and a specific ip from same range as docker0 .We can also configure specific ip ranges.
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  Chef for ConfigurationManagement  Automated configuration for app deployment  Consistency of configuration across environments  Freedom from repetitive manual software installations.  Easy to integrate with various cloud platforms (ec2,openstack etc).
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  Recipes/CookbooksRolesEnvironment Dev QA Staging Webserver/Appserver Node1 Node2 DB Node3
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  Docker + Chef lxclxclxclxclxc Dev Environment Environment on demand Autamated software configuration Ready to deploy Application
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  To be continued…..  Reference websites: https://www.docker.io/
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  Questions ?